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221 | giacomo | 1 | //===================================================================== |
2 | // FFFFFFIII RRRRR SSTTTTTTT |
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3 | // FF IIR RR SS |
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4 | // FF IR SS |
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5 | // FFFFFF RRRR SSSSST |
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6 | // FF FI RRR SS |
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7 | // FF II RRR SS |
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8 | // FF IIIIIR RS |
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9 | // |
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10 | // Basic FSF(FIRST Scheduling Framework) contract management |
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11 | // S.Ha.R.K. Implementation |
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12 | //===================================================================== |
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13 | |||
14 | #include "fsf_contract.h" |
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241 | giacomo | 15 | #include "fsf_server.h" |
221 | giacomo | 16 | |
17 | #include <pthread.h> |
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18 | #include <stdlib.h> |
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19 | |||
224 | giacomo | 20 | //#define FSF_DEBUG |
221 | giacomo | 21 | |
241 | giacomo | 22 | int fsf_server_level; |
221 | giacomo | 23 | |
241 | giacomo | 24 | int FSF_register_module(int server_level) |
224 | giacomo | 25 | { |
26 | |||
27 | printk("FSF Module\n"); |
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28 | |||
241 | giacomo | 29 | fsf_server_level = server_level; |
224 | giacomo | 30 | |
31 | return 0; |
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32 | |||
33 | } |
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34 | |||
221 | giacomo | 35 | /* Convert the contract specification to |
36 | * budget parameters |
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37 | */ |
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241 | giacomo | 38 | int set_SERVER_budget_from_contract |
221 | giacomo | 39 | (const fsf_contract_parameters_t *contract, |
40 | int *budget) |
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41 | { |
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42 | |||
43 | int local_scheduler_level = 0; |
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44 | |||
45 | switch (contract->local_scheduler_id) { |
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46 | case FSF_SCHEDULER_POSIX: |
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241 | giacomo | 47 | local_scheduler_level = POSIXSTAR_register_level(fsf_server_level,5000,32); |
221 | giacomo | 48 | break; |
49 | case FSF_SCHEDULER_EDF: |
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241 | giacomo | 50 | local_scheduler_level = EDFSTAR_register_level(fsf_server_level); |
221 | giacomo | 51 | break; |
52 | case FSF_SCHEDULER_RM: |
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241 | giacomo | 53 | local_scheduler_level = RMSTAR_register_level(fsf_server_level); |
221 | giacomo | 54 | break; |
55 | } |
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56 | |||
241 | giacomo | 57 | *budget = SERVER_setbudget(fsf_server_level, |
221 | giacomo | 58 | TIMESPEC2USEC(&(contract->budget_min)), |
59 | TIMESPEC2USEC(&(contract->period_max)), |
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60 | local_scheduler_level,contract->local_scheduler_id); |
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61 | |||
62 | return 0; |
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63 | |||
64 | } |
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65 | |||
241 | giacomo | 66 | int adjust_SERVER_budget_from_contract |
221 | giacomo | 67 | (const fsf_contract_parameters_t *contract, |
68 | int budget) |
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69 | { |
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70 | |||
241 | giacomo | 71 | SERVER_adjust_budget(fsf_server_level, |
72 | TIMESPEC2USEC(&(contract->budget_min)), |
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73 | TIMESPEC2USEC(&(contract->period_max)), |
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74 | budget); |
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221 | giacomo | 75 | |
76 | return 0; |
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77 | |||
78 | } |
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79 | |||
80 | /* Admission Test function */ |
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81 | int add_contract(const fsf_contract_parameters_t *contract) |
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82 | { |
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83 | |||
84 | return 0; |
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85 | |||
86 | } |
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87 | |||
88 | int link_contract_to_server(const fsf_contract_parameters_t *contract, |
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89 | fsf_server_id_t server) |
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90 | { |
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91 | |||
92 | return 0; |
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93 | |||
94 | } |
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95 | |||
96 | int remove_contract(fsf_server_id_t server) |
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97 | { |
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98 | |||
99 | return 0; |
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100 | |||
101 | } |
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102 | |||
103 | |||
104 | int fsf_negotiate_contract |
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105 | (const fsf_contract_parameters_t *contract, |
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106 | fsf_server_id_t *server) |
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107 | { |
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108 | |||
109 | /* Check if contract is initialized */ |
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110 | if (!contract) return FSF_ERR_NOT_INITIALIZED; |
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111 | |||
112 | /* Admission Test */ |
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113 | if (FSF_ADMISSION_TEST_IS_ENABLED) |
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114 | if (add_contract(contract)) |
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115 | return FSF_ERR_CONTRACT_REJECTED; |
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116 | |||
241 | giacomo | 117 | /* SERVER => BUDGET */ |
118 | set_SERVER_budget_from_contract(contract,server); |
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221 | giacomo | 119 | |
120 | #ifdef FSF_DEBUG |
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121 | kern_printf("(New Server %d)",*server); |
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122 | #endif |
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123 | |||
124 | if (*server >= 0) |
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125 | link_contract_to_server(contract,*server); |
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126 | else |
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127 | return FSF_ERR_CREATE_SERVER; |
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128 | |||
129 | return 0; |
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130 | |||
131 | } |
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132 | |||
241 | giacomo | 133 | int fsf_create_thread |
134 | (fsf_server_id_t server, |
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135 | pthread_t *thread, |
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136 | pthread_attr_t *attr, |
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137 | fsf_thread_code_t thread_code, |
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138 | void *arg, |
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139 | void *local_scheduler_arg) |
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221 | giacomo | 140 | { |
141 | |||
241 | giacomo | 142 | NRT_TASK_MODEL nrt; |
221 | giacomo | 143 | int local_scheduler_level,scheduler_id; |
144 | |||
145 | /* Move thread from the posix module to local scheduler */ |
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146 | |||
147 | #ifdef FSF_DEBUG |
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241 | giacomo | 148 | kern_printf("(FSF:Insert thread = %d to Server = %d)",thread,server); |
221 | giacomo | 149 | #endif |
150 | |||
151 | /* Check if server and thread exsist */ |
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241 | giacomo | 152 | if (server == NIL) |
153 | return FSF_ERR_INVALID_SERVER; |
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221 | giacomo | 154 | |
241 | giacomo | 155 | local_scheduler_level = SERVER_get_local_scheduler_level_from_budget(fsf_server_level,server); |
156 | scheduler_id = SERVER_get_local_scheduler_id_from_budget(fsf_server_level,server); |
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221 | giacomo | 157 | |
158 | /* Check if thread is already bind */ |
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159 | switch (scheduler_id) { |
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160 | case FSF_SCHEDULER_POSIX: |
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161 | |||
250 | giacomo | 162 | if (local_scheduler_arg == NULL) { |
163 | nrt_task_default_model(nrt); |
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164 | nrt_task_def_save_arrivals(nrt); |
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165 | nrt_task_def_arg(nrt,arg); |
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166 | nrt_task_def_ctrl_jet(nrt); |
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167 | nrt_task_def_level(nrt,local_scheduler_level); |
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221 | giacomo | 168 | |
250 | giacomo | 169 | *thread = task_create("POSIXSTAR", thread_code, &nrt, NULL); |
170 | } |
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241 | giacomo | 171 | if (*thread == NIL) |
172 | return FSF_ERR_CREATE_THREAD; |
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221 | giacomo | 173 | |
241 | giacomo | 174 | POSIXSTAR_setbudget(local_scheduler_level, *thread, (int)(server)); |
234 | giacomo | 175 | |
241 | giacomo | 176 | task_activate(*thread); |
221 | giacomo | 177 | |
178 | break; |
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179 | case FSF_SCHEDULER_EDF: |
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180 | |||
250 | giacomo | 181 | hard_task_def_arg(*(HARD_TASK_MODEL *)(local_scheduler_arg),arg); |
182 | hard_task_def_level(*(HARD_TASK_MODEL *)(local_scheduler_arg),local_scheduler_level); |
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183 | |||
184 | *thread = task_create("EDFSTAR", thread_code, local_scheduler_arg, NULL); |
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185 | if (*thread == NIL) |
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186 | return FSF_ERR_CREATE_THREAD; |
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187 | |||
188 | EDFSTAR_setbudget(local_scheduler_level, *thread, (int)(server)); |
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189 | |||
190 | task_activate(*thread); |
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191 | |||
221 | giacomo | 192 | break; |
235 | giacomo | 193 | |
221 | giacomo | 194 | case FSF_SCHEDULER_RM: |
235 | giacomo | 195 | |
221 | giacomo | 196 | default: |
241 | giacomo | 197 | return FSF_ERR_INVALID_SERVER; |
221 | giacomo | 198 | break; |
199 | } |
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200 | |||
201 | return 0; |
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202 | |||
203 | } |
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204 | |||
205 | int fsf_get_server |
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206 | (fsf_server_id_t *server, |
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207 | pthread_t thread) |
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208 | { |
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209 | int local_scheduler_level, scheduler_id; |
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210 | |||
241 | giacomo | 211 | local_scheduler_level = SERVER_get_local_scheduler_level_from_pid(fsf_server_level,thread); |
212 | scheduler_id = SERVER_get_local_scheduler_id_from_pid(fsf_server_level, thread); |
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221 | giacomo | 213 | |
214 | switch (scheduler_id) { |
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215 | case FSF_SCHEDULER_POSIX: |
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216 | return POSIXSTAR_getbudget(local_scheduler_level,thread); |
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217 | case FSF_SCHEDULER_EDF: |
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235 | giacomo | 218 | return EDFSTAR_getbudget(local_scheduler_level,thread); |
221 | giacomo | 219 | case FSF_SCHEDULER_RM: |
235 | giacomo | 220 | return RMSTAR_getbudget(local_scheduler_level,thread); |
221 | default: |
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221 | giacomo | 222 | return -1; |
223 | } |
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224 | |||
225 | return -1; |
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226 | |||
227 | } |
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228 | |||
229 | int fsf_cancel_contract |
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230 | (fsf_server_id_t *server) |
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231 | { |
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232 | |||
233 | int local_scheduler_level, scheduler_id; |
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234 | |||
235 | #ifdef FSF_DEBUG |
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236 | kern_printf("(Remove server %d)",*server); |
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237 | #endif |
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238 | |||
239 | /* Check server id */ |
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240 | if (*server < 0) |
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241 | return FSF_ERR_INVALID_SERVER; |
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242 | |||
241 | giacomo | 243 | local_scheduler_level = SERVER_get_local_scheduler_level_from_budget(fsf_server_level,*server); |
244 | scheduler_id = SERVER_get_local_scheduler_id_from_budget(fsf_server_level,*server); |
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221 | giacomo | 245 | |
246 | switch (scheduler_id) { |
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247 | case FSF_SCHEDULER_POSIX: |
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248 | |||
249 | /* Check if some thread use the server */ |
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250 | if(POSIXSTAR_budget_has_thread(local_scheduler_level,*server)) |
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251 | return FSF_ERR_SERVER_USED; |
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252 | |||
253 | break; |
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254 | case FSF_SCHEDULER_EDF: |
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235 | giacomo | 255 | /* Check if some thread use the server */ |
256 | if(EDFSTAR_budget_has_thread(local_scheduler_level,*server)) |
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257 | return FSF_ERR_SERVER_USED; |
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258 | break; |
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259 | |||
221 | giacomo | 260 | case FSF_SCHEDULER_RM: |
235 | giacomo | 261 | /* Check if some thread use the server */ |
262 | if(RMSTAR_budget_has_thread(local_scheduler_level,*server)) |
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263 | return FSF_ERR_SERVER_USED; |
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264 | |||
221 | giacomo | 265 | break; |
266 | } |
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267 | |||
241 | giacomo | 268 | SERVER_removebudget(fsf_server_level,*server); |
221 | giacomo | 269 | |
270 | level_free_descriptor(local_scheduler_level); |
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271 | |||
272 | remove_contract(*server); |
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273 | |||
274 | *server = -1; |
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275 | |||
276 | return 0; |
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277 | |||
278 | } |
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279 | |||
280 | int fsf_renegotiate_contract |
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281 | (const fsf_contract_parameters_t *new_contract, |
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282 | fsf_server_id_t server) |
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283 | { |
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284 | |||
285 | #ifdef FSF_DEBUG |
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286 | kern_printf("(Renegotiate for server %d)",server); |
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287 | #endif |
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288 | |||
289 | if (!new_contract) |
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290 | return FSF_ERR_NOT_INITIALIZED; |
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291 | |||
292 | if (server < 0) |
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293 | return FSF_ERR_INVALID_SERVER; |
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294 | |||
241 | giacomo | 295 | return adjust_SERVER_budget_from_contract(new_contract,server); |
221 | giacomo | 296 | |
297 | } |
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241 | giacomo | 298 |